Is there a way to check if global-module exists or not on JBoss EAP 7/6?

Issue

Considering the global-modules section detailed below, in the ee subsystem the standalone.xml configuration file:

<subsystem xmlns="urn:jboss:domain:ee:1.2">
 <global-modules>
     <module name="sample"></module>
 </global-modules>

• How to check to see if this module named sample exists under global-module using the CLI if statement?
• How to check if a certain module name exists in global-module or not? How to install one in case it is not there already?